Cisco Cisco Nexus 5010 Switch Installation Guide
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Cisco Nexus 5500 Series NX-OS Software Upgrade and Downgrade Guide, Release 7.0(8)N1(1)
In-Service Software Upgrades
Ethernet Interfaces on the Switch and the Fabric Extenders
To avoid link-down to link-up transitions during the control plane outage time, the laser is turned off for
administratively up ports that are operationally down. This situation occurs during the ISSU reboot
starting state when the switch and the FEX applications stop communicating with each other. After the
ISSU reboot and a stateful restart, the laser is turned back on. This action prevents the link state from
transitioning from down to up during an ISSU.
administratively up ports that are operationally down. This situation occurs during the ISSU reboot
starting state when the switch and the FEX applications stop communicating with each other. After the
ISSU reboot and a stateful restart, the laser is turned back on. This action prevents the link state from
transitioning from down to up during an ISSU.
PreInstallation Checks
You should do certain sanity checks to ensure that the system is ready for an ISSU and to understand the
impact of ISSU:
impact of ISSU:
•
Enter the show incompatibility command to verify that the target image is feature-wise compatible
with the current image.
with the current image.
•
Enter the show logging level command to ensure that the severity level for all processes is set to 5
or below.
or below.
•
Enter the show install all impact command to identify the upgrade impact.
•
Enter the show fex command to verify that all the FEXs are online.
•
Enter the show vpc role command to verify the vPC switch role in a vPC topology.
•
Enter the install all command to update to the latest Cisco NX-OS software.
•
Review the installer impact analysis and choose to continue.
Note
The switch might reload at this time and cause a traffic disruption if the upgrade i s not an ISSU.
•
Monitor the installation progress.
•
Verify the upgrade.
•
Enter the show install all status command to verify the status of the installation.
The following table lists the show commands that identify the impact or potential problems that might
occur when performing an ISSU.
occur when performing an ISSU.
Table 6
Upgrade show Commands
Command
Definition
show incompatibility system
Displays incompatible configurations on the current system that
impact the upgrade version. You must use the system image file.
impact the upgrade version. You must use the system image file.
show logging level
Displays the facility logging severity level configuration.
Logging levels for all processes must be set at 5 or below when
performing an ISSU. Processes with a logging level greater than 5
do not appear when you enter the show install all impact
command.
performing an ISSU. Processes with a logging level greater than 5
do not appear when you enter the show install all impact
command.
show install all impact
Displays information that describes the impact of the upgrade on
each Fabric Extender, including the current and upgrade-image
versions. This command also displays if the upgrade is disruptive
or not and if the Fabric Extender needs to be rebooted and the
reason why.
each Fabric Extender, including the current and upgrade-image
versions. This command also displays if the upgrade is disruptive
or not and if the Fabric Extender needs to be rebooted and the
reason why.